70518 : Asterisk main/utils.c ast_uri_encode() Function Caller ID Information Overflow
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
4	908	over 2 years ago	about 2 years ago	8 times	100%

Timeline

Disclosure Date
2011-01-18

Description

Asterisk is prone to an overflow condition. The 'ast_uri_encode' function in 'main/utils.c' fails to properly sanitize user-supplied input resulting in a stack-based buffer overflow. With a specially crafted caller ID data, a remote authenticated attacker can potentially execute arbitrary code.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Upgrade to version 1.4.38.1, 1.4.39.1, 1.6.1.21, 1.6.2.15.1, 1.6.2.16.1, 1.8.1.2, 1.8.2.2 or higher, as they have been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Digium, Inc.	Asterisk Business Edition	C.3.6.1
	Asterisk Open Source	1.4.38.0
		1.4.39.0
		1.6.1.20
		1.6.2.15.0
		1.6.2.16.0
		1.8.1.1
		1.8.2.1

References

CVE ID: 2011-0495 (see also: NVD)
Secunia Advisory ID: 42935 43119 43373
Bugtraq ID: 45839
Vendor Specific News/Changelog Entry: http://downloads.asterisk.org/pub/security/AST-2011-001-1.6.2.diff
http://lists.debian.org/debian-security-announce/2011/msg00037.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053689.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053713.html
Vendor Specific Advisory URL: http://downloads.asterisk.org/pub/security/AST-2011-001.pdf

Tools & Filters

	51644

Credit

Not Available

CVSSv2 Score

CVSSv2 Base Score = 6.0
Source: nvd.nist.gov | Generated: 2011-01-21 | Disagree?

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